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  1. 14 Apr, 2009 3 commits
    • NeilBrown's avatar
      md: improve usefulness and accuracy of sysfs file md/sync_completed. · acb180b0
      NeilBrown authored 
      The sync_completed file reports how much of a resync (or recovery or
reshape) has been completed.
However due to the possibility of out-of-order completion of writes,
it is not certain to be accurate.

We have an internal value - mddev->curr_resync_completed - which is an
accurate value (though it might not always be quite so uptodate).

So:
 - make curr_resync_completed be uptodate a little more often,
   particularly when raid5 reshape updates status in the metadata
 - report curr_resync_completed in the sysfs file
 - allow poll/select to report all updates to md/sync_completed.

This makes sync_completed completed usable by any external metadata
handler that wants to record this status information in its metadata.
Signed-off-by: default avatarNeilBrown <neilb@suse.de>
      acb180b0
    • NeilBrown's avatar
      md: allow setting newly added device to 'in_sync' via sysfs. · 6d56e278
      NeilBrown authored 
      When adding devices to an active array via sysfs, there is currently
no way to mark a device as 'in-sync' which is useful when
incrementally assembling an array.

So add that option.
Signed-off-by: default avatarNeilBrown <neilb@suse.de>
      6d56e278
    • Christoph Hellwig's avatar
      md: tiny md.h cleanups · 63fe0817
      Christoph Hellwig authored 
      - update inclusion guard and make sure it covers the whole file
 - remove superflous #ifdef CONFIG_BLOCK
 - make sure all required headers are included so that new users aren't
   required to include others before
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarNeilBrown <neilb@suse.de>
      63fe0817
  3. 11 Apr, 2009 2 commits
    • Linus Torvalds's avatar
      Revert "ACPI battery: fix async boot oops" · b0cbc861
      Linus Torvalds authored 
      This reverts commit 5d38258e, since the
underlying problem got fixed properly in the previous commit ("async:
Fix module loading async-work regression").

Cc: Arkadiusz Miskiewicz <a.miskiewicz@gmail.com>
Cc: Vegard Nossum <vegard.nossum@gmail.com>
Cc: Len Brown <len.brown@intel.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      b0cbc861
    • Linus Torvalds's avatar
      async: Fix module loading async-work regression · d6de2c80
      Linus Torvalds authored 
      Several drivers use asynchronous work to do device discovery, and we
synchronize with them in the compiled-in case before we actually try to
mount root filesystems etc.

However, when compiled as modules, that synchronization is missing - the
module loading completes, but the driver hasn't actually finished
probing for devices, and that means that any user mode that expects to
use the devices after the 'insmod' is now potentially broken.

We already saw one case of a similar issue in the ACPI battery code,
where the kernel itself expected the module to be all done, and unmapped
the init memory - but the async device discovery was still running.
That got hacked around by just removing the "__init" (see commit
5d38258e "ACPI battery: fix async boot
oops"), but the real fix is to just make the module loading wait for all
async work to be completed.

It will slow down module loading, but since common devices should be
built in anyway, and since the bug is really annoying and hard to handle
from user space (and caused several S3 resume regressions), the simple
fix to wait is the right one.

This fixes at least

	http://bugzilla.kernel.org/show_bug.cgi?id=13063

but probably a few other bugzilla entries too (12936, for example), and
is confirmed to fix Rafael's storage driver breakage after resume bug
report (no bugzilla entry).

We should also be able to now revert that ACPI battery fix.
Reported-and-tested-by: default avatarRafael J. Wysocki <rjw@suse.com>
Tested-by: default avatarHeinz Diehl <htd@fancy-poultry.org>
Acked-by: default avatarArjan van de Ven <arjan@linux.intel.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      d6de2c80
  5. 10 Apr, 2009 8 commits
  7. 09 Apr, 2009 27 commits